Self-synchronizing device



Nov" 28, 1944'.

W. H. T. HOLDEN SELF-SYNCHRONIZ ING DEVICE Filed Dec. 11, 1942 ATTC/PA/EV lNl/ENTOR W H 7; HOLDEN atented Nov. i Edd assarcissrir-synconra nsvrcis Application December ill. 1942, Serial No.d6d,656

7 Claims. (Cl. 172-239) This invention relates to telemetric devices andparticularly to remote control indicating and controlling rneans.

The object of the invention is to provide a dead beat and inertialesselement for indicating an angular movement which has taken place at aremote point for controlling a comparatively heavy duty correspondingand following movement by a local power source.

In accordance with this invention, the usual rotor of the indicating orcontrolling device is replaced by a radial beam tube which is madestationary. The usual stator is then mounted so as to-be rotatable. Whenthe controlling element at the distant point is moved, then the beam ofthe tube moves accordingly. When the beam moves away from a normalposition, it controls means which causes a corresponding movement of thesaid stator which continues until the beam is again brought back to itsnormal position.

A feature of the invention is a radial beam tube having a centrallylocated and sharply defined cathode and a plurality of various slmdanodes located in a circle about said cathode defined by a cross-sectionof said tube, the main structure of said tube being substantiallycylindrical.

Another feature of the invention is a cathode Fig. 1 is a diagram,partly circuit diagram and partly schematic, illustrating one embodimentof the invention. At the upper left-hand corner is a self-synchronizingtransmitter. To the right of this is a schematic cross-sectional view ofa movable three phase field structure within which is stationary radialbeam tube. In the lower part of this figure, below the broken line, is acircuit diagram showing the controlling circuit arrangement.

Fig. 2 is an alternative controlling circuit arrangement which may besubstituted for the equivalent part of Fig. 1.

The self-synchronizing device consists of an armature l adapted to berotated to any desired position by a device to be monitored indicated bythe rectangle 2. The armature l is energized by a coil 3 from a sourceof single phase alterhating current l, thus setting up alternatingcurrents in the three phase stator coils which may be transmitted to thestator coils (i of the receiver and there set up a field similar to thatof the armature l. The stator of the receiver is actually rotatable, andthe three phase connection thereto is made by brushes i, it and 9contacting with slip rings id, ti and i2 respectively. This device maybe rotated in either direction by motor iii.

The circle it indicates the envelope of a radial beam tube, having acathode is and a plurality of anodes H to 23 inclusive, concentricallyarranged about the cathode. The beam is innit cated by the broken lineoutline between anodes l6 and 25] and the cathode i5, and it will benoted that it extends in the same general direction as the armature iwhen the stator of the receiver is rotated as shown so that the twothree phase fields are similarly placed.

For a full understanding of the theory and operation of a radial beamtube, reference may be had to Patent 2,217,774 granted October 15, 1940,to A. M. Skellett.

It will be noted that the anodes E6 and Zii are narrow, that anodes ll,I9, 26 and 2d are of greater dimensions, and that anodes iii and 2?. areof still greater dimensions. The circuit arrangement in the lower partof the figure will always adjust the field ii to cause the beam toreturn to the position shown, that'is, extending between the cathode l5and the narrow centering anode's l6 and 2b.

In this position, the pulsating negative potential derived from thealternating current source t which. affects the field winding 6 incombination with the battery 26 is communicated over the beam throughanodes l6 and 20 to tube 25 which is thereby periodically (at double thefrequency of the source 6) rendered inactive or nonconducting. Theconsequent rise and fall of posi tive potential of the anode of thistube is translated by condenser 26 into a pulsating current at theoutput of tube 21 which results in the energization of relay 28. Relay28 energized opens the battery supply which may be connected by thearmatures of relays 29 and 30 to the motor l3.

Suppose the device 2 causes the armature I to rotate slightly in aclockwise direction. Immedi ately this shift results in a similarclockwise shift of the beam which may now extend from the cathode l tothe anodes l1 and 2|. Relay 28 is released and now through like actionof tubes .3! and 32, the relay 29 is operated. A circuit is nowestablished from battery armature of relay 28, armature and frontcontact of relay 29, upper portion of the field winding and the armatureof motor l3 to ground. Motor l3 operates to move the field winding 6 ina counter-clockwise direction until the beam is brought back to anodesl6 and as shown.

Similarly, if the device 2 had rotated the armature l in acounter-clockwise direction, the anodes l9 and 23 would have caused theoperation of tubes 33 and 34 and the energization of relay 30 would havecaused the motor l3 to move the field 6 in a clockwise direction.

If movement of the armature l is anticipated to be faster than the motorl3 may shift the field 6 and the follow-up gear, controlled thereby,then the anodes to either side of the narrow centering anodes may bemade wider.

If very fast operation is anticipated, the large anodes l8 and 22 may bedivided and similarly connected to other tube and relay circuits whichwill place a higher potential battery on motor l3 to cause it to operateat high speeds.

The cathode l5 may be in filamentary form so as to make the beam asnarrow as possible. Only half the anodes, covering 180 degrees about thecathode, may be employed to achieve the same result.

In the arrangement where Fig. 2 is substituted for the lower part ofFig.. 1, tubes corresponding totubes 25 and 21 and a relay correspondingto relay 28 are omitted. The neutral relays 29 and 30 ar replaced by twopolarized relays and 36, respectively, each having a winding from theanode of both tubes 32 and 34. Since these windings are difierentiallyarranged and the relays are sufiiciently biased (mechanically asindicated) positive and fast operation will be had and the motor I3 willbe operated as before. Thus when tube 32'is rendered active relay 35will be operated, since the plate current from 3.. A telemetric devicecomprising means for setting up a magnetic field in any given direction,

said field'and means controlled by said cathode ray beam for controllingsaid motor.

4. A telemetric device comprising means for setting up a magnetic fieldin any given direction,

remotely controlled means for determining the direction of said field, amotor for moving said magnetic field,,means for changing the directionof said field, a cathode ray beam device controlled by said field, saidlast device having a neutral position for the said beam, and meanscontrolled by said device in any other than said neutral position ofsaid beam for operating said'motor until said beam is returned to itssaid neutral position. I

5. A telemetric devicecomprising means for setting up a magnetic fieldin an given direction, remotely controlled means for determining thedirection of said field, motor means for moving said magnetic fieldmeans for further changing the direction of said field, a cathode raybeam device controlled by said field, said last device .comprising acentrally located cathode surrounded by a cylindrical array of anodes,one pair of said anodes located 180 degrees apart constituting a neutralbeam position, means controlled by said beam when directed to other thansaid neutral position anodes for energizing said motor means.

'6. A telemetric device comprising means for setting up a magnetic fieldin any given direction,

remotely controlled means for determining the direction of said fieldabout a given axis, motor means for rotating said magnetic field meansabout said axis to further change the direction of said field, a cathoderay beam device held stationary within said magnetic field meanscomprising a centrally located cathode positioned on the said axissurrounded by a cylindrical array 'of anodes, one pair of said anodeslocated 180 degrees apart constitutinga neutral beam positube 32 willmove the armature of relay 35 toward the right and tend to move thearmature of relay 36 toward the left in the direction in which it isbiased. When tube 34 is rendered active then the plate current from thistube will tend to move the armature of relay 35 toward the left in thedirection in which it is biased and will move the armature of relay 36toward the right and thus operate relay 36. Relays 35 and 36 perform thesame functions as relays 29 and 30, respectively,

What is claimed is:

1. A telemetric device comprising means for setting up a magnetic fieldin any given direction, remotely controlled means for determining thed'rection of said field, an electronic tube in which a radial beam maybe pointed in any direction tion and circuit means connected to othersof said anodes for controlling the energization of said motor means.

7. A telemetric device comprising means for .setting up a magnetic fieldin any given direction,

-tion, said neutral beam position anodes being c mparatively narrow, theremaining anodes being graduated in dimensions and becomingpropressively wider in proportion to their positions in relation to saidneutral beam position anodes, others of said anodes contiguous to saidneutral beam anodes being connected to means for energizing said motormeans.

WILLIAlVf H. "r. HOLDEN.

